[R] Running R Script on a Sequence of Files

[Gustavo Carvalho]

Is there a way to list only the files in a given directory without
passing pattern="..." to list.files()?

On Fri, Dec 5, 2008 at 5:10 PM, Kyle. <ambertk at gmail.com> wrote:
> Thanks, Barry. I'll use that in the future.
>
>
> ---Kyle.
>
> On Fri, Dec 5, 2008 at 11:01 AM, Barry Rowlingson <
> b.rowlingson at lancaster.ac.uk> wrote:
>
>> 2008/12/5 Chris Poliquin <poliquin at sas.upenn.edu>:
>> > Hi,
>> >
>> > I have about 900 files that I need to run the same R script on.  I looked
>> > over the R Data Import/Export Manual and  couldn't come up with a way to
>> > read in a sequence of files.
>> >
>> > The files all have unique names and are in the same directory.  What I
>> want
>> > to do is:
>> > 1) Create a list of the file names in the directory (this is really what
>> I
>> > need help with)
>> > 2) For each item in the list...
>> >        a) open the file with read.table
>> >        b) perform some analysis
>> >        c) append some results to an array or save them to another file
>> > 3) Next File
>> >
>> > My initial instinct is to use Python to rename all the files with numbers
>> > 1:900 and then read them all, but the file names contain some information
>> > that I would like to keep intact and having to keep a separate database
>> of
>> > original names and numbers seems inefficient.  Is there a way to have R
>> read
>> > all the files in a directory one at a time?
>>
>>  I can't believe the two 'solutions' already posted. It's easy:
>>
>>  ?list.files
>>
>> Barry
>>
>> ______________________________________________
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>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
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>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>